A researcher about to receive his Ph.D. has developed a pen that he says not only measures stress, but helps lower the heart rate of the user, too.
The next question, then, is how large the market for such an item might be. Many of us have a pretty good idea when we are stressed, and might not want to be--however subtly--reminded of it.
Miguel Bruns Alonso, a researcher at the Delft University of Technology in the Netherlands, says that because the sensors in the pen are entirely unobtrusive, it would give users "the right feedback" to help them "deal with their stress in a constructive way."
However, the pen's effect on heart rate is slight at best. In his experiment, Bruns found that those who received feedback on their stress levels had a heart rate roughly 5 percent slower than those who received no feedback. Still, those with lower heart rates said they did not feel any less stress.… Read more